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Washington County, RI (shown in white) has 329.28 mi² of land area and 233.5 mi² of water resources. The county is bordered by:
The county's elevations range from a low of 0' to a high of 554.5', with a weighted average of 89.5' above sea level.
Temperatures range from average lows around 20.9°F to average highs around 83°F. A year-round daily temperature averages 51.2°F. Average annual precipation is 50.3". With these temperatures and precipation, the majority of the county scores as an 7A using the USDA Plant Hardiness Zone Map (the standard by which gardeners and growers can determine which perennial plants are most likely to thrive in a location).
The estimated population of Washington County is 130,883 with 52,861 households. These households are spread across 15 unique municipalties (not all shown).
